Долбня И.П. Теоремы, относящиеся до уравнения Монжа и Ампера // Записки Горного института. 1912. Т. 3. С. 274-276.
Dolbnya I.P. Theorems related to the Monge and Ampere equation // Journal of Mining Institute. 1912. Vol. 3. p. 274-276.
Differential equations are considered in relation to theorems related to the Monge and Ampere equations (see article).